Process completed with exit code 1.

Child process error (exit code 255): PHP Fatal error: Declaration of SFC\Staticfilecache\Cache\UriFrontend::isValidEntryIdentifier(string $identifier): bool must be compatible with TYPO3\CMS\Core\Cache\Frontend\AbstractFrontend::isValidEntryIdentifier($identifier) in /home/runner/work/staticfilecache/staticfilecache/Classes/Cache/UriFrontend.php on line 20 Fatal error: Declaration of SFC\Staticfilecache\Cache\UriFrontend::isValidEntryIdentifier(string $identifier): bool must be compatible with TYPO3\CMS\Core\Cache\Frontend\AbstractFrontend::isValidEntryIdentifier($identifier) in /home/runner/work/staticfilecache/staticfilecache/Classes/Cache/UriFrontend.php on line 20 while running parallel worker